52781380 has 12 divisors (see below), whose sum is σ = 110840940. Its totient is φ = 21112544.

The previous prime is 52781369. The next prime is 52781387. The reversal of 52781380 is 8318725.

It can be written as a sum of positive squares in 2 ways, for example, as 9326916 + 43454464 = 3054^2 + 6592^2 .

It is not an unprimeable number, because it can be changed into a prime (52781387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1319515 + ... + 1319554.

It is an arithmetic number, because the mean of its divisors is an integer number (9236745).

Almost surely, 2^52781380 is an apocalyptic number.

It is an amenable number.

52781380 is an abundant number, since it is smaller than the sum of its proper divisors (58059560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52781380 is a wasteful number, since it uses less digits than its factorization.

52781380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639078 (or 2639076 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 52781380 is about 7265.0794902740. The cubic root of 52781380 is about 375.1113861710. Note that the first 3 decimals are identical.

The spelling of 52781380 in words is "fifty-two million, seven hundred eighty-one thousand, three hundred eighty".